Polyester is also called high-strength thread and nylon sewing thread is called nylon thread. We usually call it (pearlescent thread). Polyester sewing thread is made of long or short polyester fiber, wear-resistant, low shrinkage and good chemical stability. However, due to its advantages of low melting point, high speed, easy melting, plugging needle holes, easy breaking, polyester thread is widely used in the sewing of cotton, chemical fiber and blended fabrics due to its high strength, good wear resistance, low shrinkage, good moisture absorption and heat resistance, corrosion resistance, not easy to mildew, not moth eaten. In addition, it also has the characteristics of complete color, good color fastness, color fastness, sunlight resistance, etc.The difference between polyester sewing thread and nylon sewing thread, the ignition of polyester, black smoke, no heavy smell, no elasticity, while the ignition of nylon sewing thread is also a lump, white smoke, stretch smell is heavier. Wear resistance is high, light resistance is good, mildew proof, coloring degree is about 100 degrees, low temperature dyeing. It is widely used because of its high strength, durability, flat seam and can meet the needs of a wide range of sewing industrial products.